x^2 and e^x go to a club. x^2 is the life of the party, dancing with all the girls, getting the drinks in, joking with the bouncers, generally having a whale of a time. e^x skulks on the outskirts, nursing a drink and watching with a hollow envy. When x^2 takes a breather, e^x sidles up to him.
"How do you do it? How do you make yourself the life of the party like that?"
x^2 turns back, nonplussed, and replies "Well... it's not really that hard, man. You've just got to get out there and integrate!"
"I've tried that!" wailed e^x. "It didn't make any difference!"
---
Noah throws open the doors to the ark, and announces "Go forth, and multiply!"
The animals flood forth and generally get busy, except for two snakes, who slither up to Noah and hiss "We can't multiply, we're adders."
Sighing, Noah goes into the woods. He takes a saw, cuts down two trees, and forms them into a large, crude desk. Then he goes back to the snakes and says again, "Go forth, and multiply!"
"We already told you, we can't multiply, we're adders!"
"Ahh!" Exclaims Noah. "But here is a log table!"